Add support for Erfurts background jobs.
Added console client and an example extension for testing Erfurts worker.
add shebang and set exec flag
Extend default configuration by worker settings (disabled by default).
Allow no use of SMTP auth in mail extension.
Extend default configuration by worker settings.
forward Erfurt
Updated mail extension to fit with updated worker interface.
Update worker shell client demo to fit updated worker interface.
Update mail extension and cleanup shell scripts.
doc and cs issues
switch test job to test
Merge branch 'feature/worker' into develop
forward erfurt
Cleanup mail extension job class by removing obsolete members.
Ignore new shell scripts on code coverage analysis.
Reorganize shell scripts to avoid build failure.
Try to ignore code coverage analysis on shell scripts.
Try to avoid code coverage analysis for shell scripts.
Try to avoid code coverage analysis for shell scripts.